[Turbopack] allow to manually mark tasks as root

[sokra]

What?

Add mark_root() to manually mark tasks as root as performance optimization.

Closes PACK-3846

[sokra]

• [Turbopack] connect children in a batch when task is about to finish #74773 : 2 dependent PRs (#74910 , #75112 )
• [Turbopack] allow to manually mark tasks as root #75436 👈 (View in Graphite)
• [Turbopack] update event_listener to fix hanging bug #75481
• canary

This stack of pull requests is managed by Graphite. Learn more about stacking.

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
buildDuration	18.8s	16.7s	N/A
buildDurationCached	15.9s	13.3s	N/A
nodeModulesSize	391 MB	391 MB	✓
nextStartRea..uration (ms)	454ms	459ms	N/A

Client Bundles (main, webpack)

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
5306-HASH.js gzip	54 kB	53.9 kB	N/A
8276.HASH.js gzip	169 B	168 B	N/A
8377-HASH.js gzip	5.46 kB	5.46 kB	N/A
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framework-HASH.js gzip	57.5 kB	57.5 kB	N/A
main-app-HASH.js gzip	241 B	242 B	N/A
main-HASH.js gzip	34.5 kB	34.4 kB	N/A
webpack-HASH.js gzip	1.71 kB	1.71 kB	N/A
Overall change	0 B	0 B	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
polyfills-HASH.js gzip	39.4 kB	39.4 kB	✓
Overall change	39.4 kB	39.4 kB	✓

Client Pages

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amp-HASH.js gzip	512 B	510 B	N/A
css-HASH.js gzip	343 B	342 B	N/A
dynamic-HASH.js gzip	1.84 kB	1.84 kB	✓
edge-ssr-HASH.js gzip	265 B	265 B	✓
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hooks-HASH.js gzip	393 B	392 B	N/A
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routerDirect..HASH.js gzip	328 B	328 B	✓
script-HASH.js gzip	397 B	397 B	✓
withRouter-HASH.js gzip	323 B	326 B	N/A
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Overall change	3.59 kB	3.59 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
_buildManifest.js gzip	748 B	747 B	N/A
Overall change	0 B	0 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
index.html gzip	523 B	522 B	N/A
link.html gzip	539 B	537 B	N/A
withRouter.html gzip	520 B	519 B	N/A
Overall change	0 B	0 B	✓

Edge SSR bundle Size

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
edge-ssr.js gzip	129 kB	129 kB	N/A
page.js gzip	210 kB	210 kB	N/A
Overall change	0 B	0 B	✓

Middleware size

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
middleware-b..fest.js gzip	670 B	667 B	N/A
middleware-r..fest.js gzip	155 B	156 B	N/A
middleware.js gzip	31.3 kB	31.3 kB	N/A
edge-runtime..pack.js gzip	844 B	844 B	✓
Overall change	844 B	844 B	✓

Next Runtimes

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
app-page-exp...dev.js gzip	386 kB	386 kB	✓
app-page-exp..prod.js gzip	132 kB	132 kB	✓
app-page-tur..prod.js gzip	145 kB	145 kB	✓
app-page-tur..prod.js gzip	141 kB	141 kB	✓
app-page.run...dev.js gzip	373 kB	373 kB	✓
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app-route-ex...dev.js gzip	39.2 kB	39.2 kB	✓
app-route-ex..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.6 kB	25.6 kB	✓
app-route-tu..prod.js gzip	25.4 kB	25.4 kB	✓
app-route.ru...dev.js gzip	40.8 kB	40.8 kB	✓
app-route.ru..prod.js gzip	25.4 kB	25.4 kB	✓
dist_client_...dev.js gzip	356 B	356 B	✓
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pages-api-tu..prod.js gzip	9.69 kB	9.69 kB	✓
pages-api.ru...dev.js gzip	11.8 kB	11.8 kB	✓
pages-api.ru..prod.js gzip	9.68 kB	9.68 kB	✓
pages-turbo...prod.js gzip	21.9 kB	21.9 kB	✓
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pages.runtim..prod.js gzip	21.9 kB	21.9 kB	✓
server.runti..prod.js gzip	60.2 kB	60.2 kB	✓
Overall change	1.65 MB	1.65 MB	✓

build cache Overall increase ⚠️

	vercel/next.js canary	vercel/next.js sokra/mark-root-tasks	Change
0.pack gzip	2.1 MB	2.1 MB	⚠️ +2.19 kB
index.pack gzip	75 kB	74.4 kB	N/A
Overall change	2.1 MB	2.1 MB	⚠️ +2.19 kB

Diff details

Diff for main-HASH.js

Diff too large to display

Commit: 912c37c

[bgw]

[Re: lines +1603 to +1604]

Move this comment down?

See this comment inline on Graphite.

[bgw]

Is it not problematic for a function to be excluded from strong consistency?

[sokra]

Merge activity

• Feb 3, 8:44 AM EST: A user merged this pull request with Graphite.